This circuit was obtained from a 1980's QST magazine. The circuit can generate 1 to 15 MHz signals with 1 Vpp at 50 ohms load. Used transistors are still common today.
The 4046 PLL is uncommon these days. This circuit was found in the August 1994 issue of...
This circuit was found in a 1980s documentation. The indicated integrated circuits are uncommon...
This circuit uses a transistor as noise source and a 741 IC as amplifier, sourcing a high...